MCQ Bank

The set of all strings over an alphabet, including the empty string, is denoted by which operation on the alphabet?

A brute-force attack on a cipher attempts to:

An epsilon (empty) transition in a nondeterministic finite automaton allows a state change:

A phishing attack typically attempts to:

Two functions f(n)=3n and g(n)=n satisfy which asymptotic relationship?

Cascading Style Sheets (CSS) are used in web development to:

Which scheduling scenario best describes preemptive scheduling?

Pipe A can completely fill an empty water tank in 15 hours. Pipe B acts as a leak and can empty the full tank in 60 hours. If both pipes are opened simultaneously in an empty tank, how many hours will it take to completely fill the tank?

Pipe A can completely fill an empty water tank in 10 hours. Pipe B acts as a leak and can empty the full tank in 40 hours. If both pipes are opened simultaneously in an empty tank, how many hours will it take to completely fill the tank?

Pipe A can completely fill an empty water tank in 5 hours. Pipe B acts as a leak and can empty the full tank in 20 hours. If both pipes are opened simultaneously in an empty tank, how many hours will it take to completely fill the tank?

Pipe A can completely fill an empty water tank in 10 hours. Pipe B acts as a leak and can empty the full tank in 15 hours. If both pipes are opened simultaneously in an empty tank, how many hours will it take to completely fill the tank?

Pipe A can completely fill an empty water tank in 8 hours. Pipe B acts as a leak and can empty the full tank in 24 hours. If both pipes are opened simultaneously in an empty tank, how many hours will it take to completely fill the tank?

Pipe A can completely fill an empty water tank in 12 hours. Pipe B acts as a leak and can empty the full tank in 24 hours. If both pipes are opened simultaneously in an empty tank, how many hours will it take to completely fill the tank?

Pipe A can completely fill an empty water tank in 16 hours. Pipe B acts as a leak and can empty the full tank in 48 hours. If both pipes are opened simultaneously in an empty tank, how many hours will it take to completely fill the tank?

Pipe A can completely fill an empty water tank in 15 hours. Pipe B acts as a leak and can empty the full tank in 30 hours. If both pipes are opened simultaneously in an empty tank, how many hours will it take to completely fill the tank?

Pipe A can completely fill an empty water tank in 20 hours. Pipe B acts as a leak and can empty the full tank in 30 hours. If both pipes are opened simultaneously in an empty tank, how many hours will it take to completely fill the tank?

Pipe A can completely fill an empty water tank in 40 hours. Pipe B acts as a leak and can empty the full tank in 60 hours. If both pipes are opened simultaneously in an empty tank, how many hours will it take to completely fill the tank?

Pipe A can completely fill an empty water tank in 30 hours. Pipe B acts as a leak and can empty the full tank in 120 hours. If both pipes are opened simultaneously in an empty tank, how many hours will it take to completely fill the tank?

Pipe A can completely fill an empty water tank in 6 hours. Pipe B acts as a leak and can empty the full tank in 12 hours. If both pipes are opened simultaneously in an empty tank, how many hours will it take to completely fill the tank?

Pipe A can completely fill an empty water tank in 30 hours. Pipe B acts as a leak and can empty the full tank in 60 hours. If both pipes are opened simultaneously in an empty tank, how many hours will it take to completely fill the tank?